QmlDesigner: Fix missing validation

Change-Id: Ic8663d6c44cadbf3678ae564ec91572998d6d236
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/qmldesigner/designercore/metainfo/nodemetainfo.cpp

@@ -2487,6 +2487,9 @@ bool NodeMetaInfo::isQmlComponent() const
         using namespace Storage::Info;
         return isBasedOnCommonType<QML, Component>(m_projectStorage, m_typeId);
     } else {
+        if (!isValid())
+            return false;
+
         auto type = m_privateData->qualfiedTypeName();
 
         return type == "Component" || type == "Qt.Component" || type == "QtQuick.Component"